Jacob fickingeb



J. F-ICKINGER.

Millstone Exhaust.

No. 63,712. Patented April 9., 1867 strut ffi aiteh tatte- IMPROVEMENT Ihi GRINDING-MILLS.

an fidgttnlt attract-It itt iigtfit itrttcts @ateut amt mating part at flge time.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, JACOB FICKINGER, of Kingsville, in the county of Ashtabula, and State of Ohio, have invented certain new and useful Improvements in Millstones and I do hereby declare that the folloiving is a full and complete description of the construction and operation of the same, reference being had to the accompanying drawings, making a part of this specification, in which Figure 1 is a top View.

Figure 2 is a vertical section.

Like letters of reference refer to like parts.

A is the upper and B the bed-stones, O the spindle, and D the bail, constructed and operating in the usual manner. The two stones are placed in a.-curb, indicated bythe dotted lines E, fig. 2. The fans F F are secured to the top of the stone A, as shown in fig. 1. G are caps, which cover the openings 0, that extend through the stone A to the bed-stone B, as represented in fig.2. The object of this invention islto keep the stones and meal cool while in operation. As the stone A revolves, by the action of the fans F, above referred to, the air is drawn from the central opening I of the curb, through which a fresh current is constantly passing towards the periphery of the stone, and in its passage is caught by the caps G and directed down through the openings 0, where it comes in contact with the'faceof the stones and meal; thus a fresh current of air is always passing through these openings to the stones, kcepingthem and the meal always cool. It is not assumed that all the air which may be drawn by the fans through the openings in the curb is caught up by the caps and deflected to the space between the stones, but that, by the action of the fans, a stronger current of air is produced than could be without them. By thus producing a stronger current from the outside, a cooler one is the result; hence a much greater volume of cool air is supplied to the grinding surfaces of the stones. The surplus air which the caps do not take up still surrounds'the stone, and hence the heated air arising from the stone to the top of the curb is rapidly'cooled down, and the stone, in consequence, kept much cooler than it could be without this augmen" tation of the current of air; thus the induction of a cool current of air from thcoutsidc to the grinding surface of the stones, also the surplus of cool air in contact with .the heated nir'urisin-g from the stones, keeps them cool, and hence avoids the overheating of the flour.

What I claim as my improvement, and desire to secure by Letters Patent, is

The fans F, caps G, and openings c, in combination with the millstones and curb, as and for the purpose set forth. JACOB FIGKINGER.

Witnesses W. H. Buanrnen, J. HOLMES. 

